Apparatus for reducing paper stock



April 11 1933.

H. J. ANDREWS APPARATUS FOR REDUCING PAPER STOCK Filed April 11, 1927anoemboz Patented Apr. 11, 1933 UNITED STATES HENRY J. ANDREWS, OF, FORTWAYNE, INDIANA,

TO BLACK oLAwsoN ooiurANY, or HAMILTON, OHIO, Aconronnrron on OHIO,

.AIBPARATUS non REDUCING EATER s'rocx Application filed April 11,

series with means for conveying the reduced stock from one machineto thetub of the next adjacent machine. Fundamentally ieach machine consistsofa tub or container for receiving the paper stock together withthenecessary water or other liquids used in the process a ofproduction'together with a receiver for the reduced stock which isdelivered by centrifugal force to a perforated member through which thestock protrudes and is removed and deposited intothe receiver.

This invention contemplates means for conveying the reduced stockfromthe receiver of one machine to the tub of another machine where thisstock is again subjected to the action of the tub beater and the reducedstock again collected in the receiver. As a. consequence of thisarrangement stock may be placed in the first machine whereupon thereduced stock is collected and conveyed to the tub of the second machinewhereupon the reduced stock is collected and conveyed to the tub of athird machine, etc., it being practical to provide as many tub beatersas found necessary, desirable or expedient. Thus the re duced stockdelivered by each successive beater is correspondingly of a finertexture so that the grade of stock finally obtained may be governed bythe number of machines connected in a series. p

This invention has also as an object the provision of a mechanicalconveyor with each tub beater for the purpose of removing the reducedstock from the receiver irrespective of whether a plurality of tubbeaters are used or not.

The several obj ects,advantages' and novel details of construction ofthis invention will be made more apparent as this description proceeds,especially when considered in con- I a pulley 1927; Serial No. 182,862;

AssrGNoR, BY MESNE ASSIGNMENTS,

nection with the accompanying drawing wherein v Figure 1 is a sectionalelevational view of an apparatus constructed in accordance, with thisinvention, and

Figure 2 is an end elevation partly in section of the apparatus. -c aReferring now particularly to the drawing whereinlike referencecharacters indicate like parts it will be noted thatfl have illustratedthree paper stock reducing, machinesor tub heaters 10, 11, and 12. Whilethese machines may be of any desired type or. construction, the typeherein illustratedand described is substantially similar to that typeillustrated in United States-Patents No. 1,244,144 granted October23,191'7to- C. W. Unkle and T, D". Griley and No. 1,547,848 granted July28, 1925 to C; W. Unkle. Inasmuch as the details of construction-of thetype 1 of 1machine herein illustrated are described fully intheaforementioned patents itis only,

necessary herein to mention that each ma-j' chine includes as apart-thereof a tub 13into which the stock t'o be reduced, together with,the necessary water and other liquids used in thepro'cess, are placed.Each machine also 'includesa hood 14' within which arotary beater(not'shown) isarranged which throws the stock by centrifugal forceagainst a perforatedportion 15 of the hood. This pers foratedportion hasassociated therewith a stockremove'r which consists of a plurality ofplates 16 adapted to be reciprocated between guides 17 bymeans ofarod18; 'The rod- '18 is reciproc'ated by a pitman 19 carry-' ing a pin 20working inthe slot ofa member '2Lcarried by the rod: 18. Pitman 19is'operated by an arm 22 rotated by a wormwheel '23 driven-by a worm24"on a shaft driven by 25 may be-driven by a belt 26 which engages apulley'27 on a shaft 28; This shaft pref; erably extends transverselythrough" the machine and' carrieszthe beater roll (not illustrated) Adriving pulley 29 is mounted upon the other end ofthe shaft whereby theparts may be driven as will be obvious. Thereduced stock which protrudesthrough the aperturesin the;perforated,portion glfi 25. As seen fromFigure 2-,.pulley V of the hood, is freed by the reciprocation of theplates 16 and is deposited in a gutter or receiver 30. The receiver isprovided with an extension or conduit 31 extending therefrom which isprovided with a branch conduit 82. The branch conduit 32 of eachconbelt. It will be obvious, however, thatany desired means for drivingthe conveyor may be provided. It will likewise be obvious that anyothertype of mechanical conveyor may be utilized as well as any other type ofmeans which will eiiect the transfer of the reduced tub of the next. V I

' In the structure herein illustrated, it will be obvious-that thereduced stock deposited in the receiver 30 of the first machine 10 willstock from the receiver of one machine to the V be moved from thereceiver through the conduit 31 and will then pass through branchconduit 32 to-the tub of machine 11. The stock will then be acted uponin the customary manner by this tubbeater whereupon a still greaterreduction of the stock is obtained and this finely reduced stockdelivered to the receiver 30 of this machine whereagain the conveyortransfers the same and deposits it to the tub of machine 12 where theprocess is repeated. It will be immediately obvious to those skilled inthis art that any number of machines may be connected in series and that'the'texture of the stock will becomeincreas ingly fine depending uponthe number of machines through which the stock is passed. The stock maybe collected at theend of the conveyor beyond the last machine.

Obviously the herein described apparatus may be used to advantage withsingle tubbeaters for positively and quickly re-' moving the reducedstock deposited in thereceiver. I

While one embodiment of the invention has been illustrated and describedherein somewhat in detail it will befreadily appreciated by thoseskilled in this art that various changes may be resorted toinvolvingn'ot only the substitution of other types ofpaper pulp reduc ngmachines but also any type of con-' veymg apparatus and to thisendreservation' is made to makesuch changes in the specific constructionillustrated as may come within the purviewof the accompanyingclaims. aWhat I claim as my invention is r 1. In an'appa ratus for reducing paperstock, 'a plurality of tub beaters having aligned'screen elements, thescreen elements having a continuous chute commoirto all the conveyingbeaters, said chute having outlets for the pulp screened from one beaterleading into an adjacent beater.

2. In an apparatus of the character described, a plurality of tubbeaters having a series of screen elements, the scrieen elements havinga continuouschute common to 1 all the beaters, said chute having outletsfor the pulp screened from one beater leading and depth of impressionsformed thereby inpulp conveyor in said chute.- v

3. In an apparatus for reducing paper stock, a pluralityot' tub beatersarranged adjacent: one another in a series, said tub beaters having aseries of aligned hood screens arranged adjacent a continuous receivingpassage having outlets for the pulp screened from one beater leadinginto an adjacent beater and a mechanically operated pulp conveyor insaid passage. V

4. In a continuous system of pulp prep aration, a plurality of beaterengines ar-,

ranged side by side in a seriesat a common level and each including abeater roll si-. multaneously discharging coarse and fine pulp materialfrom. the periphery thereof, a substantially horizontal trough and acontinuous mechanical conveyor therein, said CERTIFICATE 0F CORRECTION.

Patent Ne. 13 33526. April 11, 1933.

HENRY J. ANDREWS.

it is hereby eertified that error appears in the printed specificationof the above numbered patent requiring eerrection as follows: Page 2,iine 75, claim 2, strike out the Words "and depth of impressions formedthereby in" and insert instead inte en ariiaeent heater, and ameehanieai"; and that the said Letters Patent shoniti he read with thiscorrection therein that the same may conform to the reeerti at the casein the Patent Office.

Signed and seeied this 23rd day of May, A. D. 1933.

M. J. Moore.

(Seal) Acting Commissioner of Patents.

